CN106086454B - A kind of technique for being enriched with platinum group metal and gold - Google Patents
A kind of technique for being enriched with platinum group metal and gold Download PDFInfo
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- CN106086454B CN106086454B CN201610665595.1A CN201610665595A CN106086454B CN 106086454 B CN106086454 B CN 106086454B CN 201610665595 A CN201610665595 A CN 201610665595A CN 106086454 B CN106086454 B CN 106086454B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/06—Chloridising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a kind of technique for being enriched with platinum group metal and gold, comprise the following steps：(1) it is standby to obtain powder for raw material of the crushing containing platinum group metal and gold；(2) powder is added in hydrochloric acid and is acidified and filters out waste liquid, obtain reaction mass；(3) by reaction mass and alkali metal chloride, sulfuric acid and mixed in hydrochloric acid it is uniform mixed material, mixed material is heated to 60 90 DEG C of 30 35min of reaction, thick slag is filtered after cooling, produces the enrichment solution of platinum group metal and gold.Time used in present invention enrichment platinum group metal is few, cycle is short, platinum content in resulting solution in platinum group metal can reach 1 4g/L, whole preparation process of the present invention is without ore dressing, pyrolytic semlting and pressurized acid leaching, it is metallurgical to instead of traditional cyanide, production capacity is improved, the environmental pollution caused by effectively reducing in smelting process.
Description
Technical field
The invention belongs to precious metal smelting field, and in particular to a kind of technique for being enriched with platinum group metal and gold.
Background technology
Platinum group metal belongs to noble metal, is the metal that total resources is less in all metals that the earth's crust is contained, and it is distributed very
Unbalanced, Chinese Platinum metals resources are poor, and the 0.2% of Jin Zhan worlds gross reserves, platinum group metal has other metals not because of it
Analogous, excellent physical chemistry overall characteristic, throughout the year constant bright and new beautiful color, the service life and length of lasting stability
Phase storage is not devalued, unique bioactivity and catalytic activity, it has also become one kind is irreplaceable, is widely used in human lives
Particulate metal of every field.
Platinum group metal is used as " the first high-technology metal ", and its production development has the characteristics that：1st, South Africa and Russia's production
Amount is total to account for the 94% of Gross World Product, forms absolute monopoly position；2nd, platinum family gold in Canadian and Chinese Jinchuan mineral intergrowth
It is low to belong to grade；3rd, the content that secondary platinum group metal osmium contained in Primary Pt mineral and mineral intergrowth, iridium, ruthenium, rhodium reclaim comprehensively accounts for platinum
The 10% of race's metal total output；4th, because in resource set and monopolization that multinational capital continues for a long time control, its concentration of production is in minority
Company, the refining of world platinum group metal also concentrate on a small number of refineries, such as Japanese Tanaka, the refining of De Li and Shi Fu companies
Factory, they are refined extraction platinum group metal with the flint clay resource in existing Zibo area under one's jurisdiction again, while conservative know-how, control supply
Need to rob Chinese resource with price, with current data rough estimate, more than the accumulative extraction kiloton of above-mentioned three company, and burnt treasured
Contain this phenomenon of platinum group metal in stone but not known to compatriots, more nobody carries out enrichment refinement to this, causes China
Precious Metals Resources annual all a large amount of be lost in.
The enrichment method of platinum group metal and selected raw material are closely related, such as noble metal grade in the cupro-nickel high-sulfur of South Africa
Height, in smelting for the purpose of effective enriching and recovering noble metal, it is short to make every effort to high and low metal separation process, efficiency high, as early as possible with height
The rate of recovery extracts high-grade noble metal concentrate；And noble metal grade is low in Chinese Jinchuan and Canadian cupro-nickel high-sulfur, then with
It is main purpose that the output of economical and efficient, which has the high quality of the market competitiveness, multi items nickel, copper, cobalt product, domestic at present main
To use two sections of cyanidings to extract noble metal concentrate, the technological process it is very long, it is necessary to metallurgical process it is more, technical difficulty is big, and
Serious environmental pollution is caused in extraction process.
The content of the invention
In view of this, it is an object of the invention to overcome the deficiencies of the prior art and provide one kind enrichment platinum group metal and gold
Technique, the technique enrichment platinum group metal cycle is short, without ore dressing before enrichment, can be achieved without HTHP in enrichment process
The enrichment of platinum group metal.
To realize object above, the present invention adopts the following technical scheme that：
A kind of technique for being enriched with platinum group metal and gold, comprises the following steps：
(1) it is powder to crush the raw material containing platinum group metal and gold；
(2) it is to be acidified in 1-4mol/L hydrochloric acid the powder to be added into molar concentration, is filtered after acidifying, removes filter
Liquid, obtain reaction mass；
(3) alkali metal chloride, sulfuric acid solution and hydrochloric acid solution is sequentially added into the reaction mass to be well mixed
Mixed material, the mixed material is heated to 60-90 DEG C of reaction 30-35min, rear filtering, removes filter residue, resulting solution is
Platinum group metal and the enrichment solution of gold.
The present invention carries out chlorination reaction to raw material, and its reaction mechanism is when by H2SO4With the acid system acidity of HCl compositions
More than 1mol/L, Cl-When reaction density is between 1-120g/L, SO is being contained in platinum group metal4 2-And Cl-In the environment of have spy
Different physical property and chemical property, can be by H2SO4With HCl composition acid system in Cl-The relatively stable chlorine of reaction generation
Complex anion, the oxidizing potential of platinum group metal is reduced, that is, reduces the pressure and temperature of oxidation dissolution, can enter at normal temperatures and pressures
Row chemical reaction, realize that gas-liquid-solid three-state reacts, so as to realize the dissolving of platinum group metal and enrichment.
Preferably：The fineness of powder described in step (1) is more than 200 mesh.
It is to make it easier to react with reaction solution, make by the purpose that the raw material containing platinum group metal and gold is crushed
Platinum group metal is obtained to be easy to be enriched with and refine.
Preferably：Raw material containing platinum group metal and gold described in step (1) is flint clay.
When the raw material containing platinum group metal and gold in the present invention is flint clay, flint clay material after enriched extraction
Waste residue, still with preferable fire resistance, use of the raw material in fire resisting material field is not influenceed.
Flint clay, a kind of high-quality hard fire clay of Shandong Province of China province Zibo area output.The flint clay raw ore of standard
Al2O3Content 38%, Al after calcining2O3Content is 44% or so, Fe2O3<2%, stable components, homogeneous, compact structure, break
Face is in conchoidal, white, for producing tonerde fire resistant materials.Flint clay described in us is generally referred to as ripe flint clay
(CALCINED CLAY).The composition of ripe flint clay and composition are more complicated, no fixed structure and composition.Ripe flint clay in water not
Easily scattered, plasticity is relatively low.The ripe flint clay that China is currently known is mostly the sedimentary clay of kaolinite Within Monominerals type, or also have
Dickite or hydromica class mineral association.There is Shandong in the main place of production, especially preferable with quality with Shan Dongwang villages one, its flint clay whiteness
It is good with luminosity, and be magnetic.
Preferably：The mass ratio of powder described in step (2) and the hydrochloric acid solution is 1:2-5.
For purified feed stock, powder is first acidified to remove SiO2, when the mass ratio of powder and the hydrochloric acid is 1:
During 2-5, impurity-eliminating effect is preferable, and now hydrochloric acid dosage is less, will not cause to waste.
Preferably：The molar concentration of hydrochloric acid solution described in step (3) is 1-4mol/L, and the sulfuric acid solution is by quality
Fraction is that 98% concentrated sulfuric acid and water press 0.9-1.1：1 mass ratio mixing gained.
Further：Reaction mass, alkali metal chloride, sulfuric acid solution, the mass ratio of hydrochloric acid solution described in step (3)
For 4.5-5.5:1：4.5-16.5:31.5-49.5.
When reaction mass and the reaction solution being made up of alkali metal chloride, sulfuric acid, hydrochloric acid are with aforementioned proportion hybrid reaction,
By H2SO4It is more than 1mol/L, Cl with the acid system acidity of HCl compositions-Reaction density is between 1-120g/L, platinum group metal
Can be by H2SO4With HCl composition acid system in Cl-The relatively stable chlorine complex anion of reaction generation, reduces platinum group metal
Oxidizing potential, that is, the pressure and temperature of oxidation dissolution are reduced, so as to realize the dissolving of platinum group metal and enrichment.
Containing SO in other platinum group metal4 2-And Cl-In the environment of there is special physical property and chemical property, normal
It can be chemically reacted under normal temperature and pressure, realize that gas-liquid-solid three-state reacts.It should be noted that need during the course of the reaction tight
Lattice control the climbing speed of temperature, if speed is too high, gas and liquid can be excessive, cause the loss of platinum group metal.
Alkali metal refers to six metallic elements of the group ia in the periodic table of elements：Lithium, sodium, potassium, rubidium, caesium, francium.Alkali metal
It is argenteous metal (caesium is in golden colour lustre) mostly, density is small, and fusing point and boiling point have very high all than relatively low, under the status of criterion
Reactivity；They easily lose the cation that valence electron forms+1 electric charge of band；Their quality are soft, can be cut with knife, expose silver
The section of white；Due to just being tarnished quickly with the oxygen reaction in air, section.In nature, alkali metal is only in salt
Middle discovery, never exists with simple substance form.With water fierce reaction can occur for alkali metal, generate the hydroxide of strong basicity,
It is and stronger with relative atomic mass increase respond.All alkali metal having found are present in nature.According to chemistry
Elemental abundance order, abundance highest is sodium, next to that potassium, is finally francium followed by lithium, rubidium, caesium.
Further：After reaction terminates described in step (3), alkali metal chloride and the temperature at 60-90 DEG C are added again
After the lower reaction 30-35min of degree, then carry out the cooling, filtering, the alkali metal chloride of again in which addition with it is described instead
The mass ratio for answering material is 1:4.5-5.5.
The enrichment process of the present invention can repeat as a workshop section, in order that platinum group metal is enriched with completely, can carry out
Repeatedly addition alkali metal chloride extraction, is generally repeated twice, you can realize more than 98% enrichment recovery rate.
Preferably：Alkali metal chloride described in step (3) is sodium chloride and/or potassium chloride, when for sodium chloride and chlorination
During potassium, the two is mixed in any proportion, preferred sodium chloride in the present invention, because in the experimentation of the present invention, inventor's warp
Test of many times finds that when alkali metal chloride is sodium chloride its recovery rate is higher, and is other alkali gold in addition to sodium chloride
During category, recovery rate is only 30% when alkali metal chloride is sodium chloride.
Preferably：Light radiation is added in course of reaction described in step (3).
Inventor has found in experimentation, irradiates concerted reaction than directly unglazed using light source during heating
Firing equipment under the heating response speed that carries out add 10-12 times, effectively shorten the reaction time.
In summary, The present invention gives platinum group metal and Au plasma technique, platinum group metal is carried out using the technique
The time is few used in enrichment, and the cycle is short, and the content of platinum reaches 1-4g/L in platinum group metal in resulting solution, and the present invention is water-soluble
Chlorination processes method, in whole preparation process without ore dressing, without pyrolytic semlting, without pressurized acid leaching, it instead of traditional cyanide
Metallurgy, production capacity is improved, avoid " catching up with nitre to operate ", the environmental pollution caused by effectively reducing in smelting process, and
And when it is raw materials used be flint clay when, can not only lift the added value of flint clay, compatriots is recognized the new application of flint clay, be
The precious metal smelting cause of motherland is done one's bit, and the waste residue behind extracted platinum group metal still may be used as quality refractory material
Material, industrial output value are high.
Embodiment
Below by 4 specific embodiments, technical scheme is described in further detail, in the present invention
In, if not refering in particular to, all parts, percentage are unit of weight, all equipment and raw material etc. be commercially available or
What the industry was commonly used.Method in following embodiments, it is the conventional method of this area unless otherwise instructed.
Embodiment 1
The invention provides a kind of technique for being enriched with platinum group metal and gold, comprise the following steps：
(1) ripe flint clay raw material is taken, it is standby for the ripe flint clay powder of 200 purposes to be crushed into fineness；
(2) concentrated sulfuric acid that mass fraction is 98% is pressed 0.9 with water：1 mass ratio mixes to obtain sulfuric acid solution, takes
Molar concentration is that 1mol/L hydrochloric acid solution is standby；
(3) the ripe flint clay powder and hydrochloric acid solution are pressed 1:2 mass ratio is acidified, and waste liquid is filtered out after acidifying,
Obtain reaction mass；
(4) reaction mass and sodium chloride, sulfuric acid solution and hydrochloric acid solution are pressed 4.5:1：4.5:31.5 mass ratio
Carry out mixing to obtain mixed material, the mixed material is heated to 60 DEG C of reaction 12min, cooling under the illumination effect of flame
Thick slag is filtered after 5min, resulting solution is the enrichment solution of platinum group metal and gold.
The platinum group metal generated after embodiment reaction and the enrichment solution color of gold are gorgeous, are shallow at 98-100 DEG C
Yellow green, glassy yellow is gradually become when temperature is reduced to 90 DEG C, the duration is about 20 seconds or so, with the continuation of temperature
Drop, and it is changed into chartreuse.
Embodiment 2
The invention provides a kind of technique for being enriched with platinum group metal and gold, comprise the following steps：
(1) green coke raw material for gem is taken, the green coke jewel powder for being crushed into 250 mesh fineness is standby；
(2) concentrated sulfuric acid that mass fraction is 98% is pressed 1 with water：1 mass ratio mixes to obtain sulfuric acid solution, takes and rubs
The hydrochloric acid solution that your concentration is 2mol/L is standby；
(3) the green coke jewel powder and hydrochloric acid solution are pressed 1:3 mass ratio is acidified, and waste liquid is filtered out after acidifying,
Obtain reaction mass；
(4) reaction mass and sodium chloride, sulfuric acid solution and hydrochloric acid solution are pressed 5:1：10.5:40.5 mass ratio enters
Row mixes to obtain mixed material, and the mixed material is heated into 80 DEG C of reaction 13min under the illumination effect of sodium vapor lamp, cools down 7min
After filter thick slag, resulting solution is the enrichment solution of platinum group metal and gold.
The platinum group metal generated after embodiment reaction and the enrichment solution color of gold are gorgeous, at 90 DEG C or so to be shallow
Reddish yellow.
Embodiment 3
The invention provides a kind of technique for being enriched with platinum group metal and gold, comprise the following steps：
Ore is chosen, Central South University is delivered to and carries out mineralogical composition detection, golden in raw material contain is known according to censorship report
Measure and be less than 0.001g/t for 0.32g/t, the content of platinum, thus it is speculated that obtain containing noble metal in the raw material, use your gold contained below
The ore of category is tested.
(1) ore containing noble metal is taken, the mineral dust containing noble metal for being crushed into 200 mesh fineness is standby
With；
(2) concentrated sulfuric acid that mass fraction is 98% is pressed 1.1 with water：1 mass ratio mixes to obtain sulfuric acid solution, takes
Molar concentration is that 4mol/L hydrochloric acid solution is standby；
(3) mineral dust containing noble metal and hydrochloric acid solution are pressed 1:5 mass ratio is acidified, and is filtered after acidifying
Except waste liquid, reaction mass is obtained；
(4) reaction mass and sodium chloride, sulfuric acid solution and hydrochloric acid solution are pressed 5.5:1：16.5:49.5 mass ratio
Carry out mixing to obtain mixed material, the mixed material is heated to 90 DEG C of reaction 15min under the illumination effect of fluorescent lamp, again
Add sodium chloride and 15min is reacted at a temperature of 80 DEG C, the sodium chloride and the mixed material of again in which addition
Mass ratio is 1:5, thick slag is filtered after then cooling down 10min, resulting solution is the enrichment solution of platinum group metal and gold.
The platinum group metal generated after embodiment reaction and the enrichment solution color of gold are gorgeous, are gorgeous at 98-100 DEG C
Beautiful rose, lucifuge are deposited more than 5 months, and heating is non-discolouring, and observing liquid after 24 months, under normal temperature condition becomes
For yellowish red color.
Embodiment 4
The invention provides a kind of technique for being enriched with platinum group metal and gold, comprise the following steps：
(1) ore containing noble metal is taken, the mineral dust containing noble metal for being crushed into 250 mesh fineness is standby
With；
(2) concentrated sulfuric acid that mass fraction is 98% is pressed 1 with water：1 mass ratio mixes to obtain sulfuric acid solution, takes and rubs
The hydrochloric acid solution that your concentration is 3mol/L is standby；
(3) mineral dust containing noble metal and hydrochloric acid solution are pressed 1:4 mass ratio is acidified, and is filtered after acidifying
Except waste liquid, reaction mass is obtained；
(4) reaction mass and sodium chloride, sulfuric acid solution and hydrochloric acid solution are pressed 5:1：15:45 mass ratio is mixed
Mixed material is closed to obtain, the mixed material is heated to 90 DEG C of reaction 15min under the illumination effect of incandescent lamp, adds chlorine again
Change sodium and 15min is reacted at a temperature of 80 DEG C, the mass ratio of the sodium chloride and the mixed material of again in which addition
For 1:5, thick slag is filtered after then cooling down 10min, resulting solution is the enrichment solution of platinum group metal and gold.
The platinum group metal generated after embodiment reaction and the enrichment solution color of gold are gorgeous, are shallow at 98-100 DEG C
Crocus, color changes without obvious after temperature reduces.
The gained platinum group metal in embodiment 1-4 and the color change of the enrichment solution of gold are illustrated below.
1st, the reason for color of the enrichment solution of gained platinum group metal and gold is varied with temperature and changed is different by other
What the property of the chloro-complex of price was determined, temperature is different, and chemical valence of the element in chloro-complex is different, different chlorine complexings
The property of thing is also different, and part qualitative detection foundation can be used as according to this property.
2nd, interfering property of color be present due to the difference of its content between each element in solution, therefore
Need to be verified by following experiments are further.
Below according to《Platinum group metal and the chemical analysis guide of gold》Hereby Boolean lattice etc. writes (nineteen sixty-five version) to " Soviet Union " C.N. gold
Qualitative detection is carried out to the enrichment solution of the platinum group metal of gained and gold in 1-4 of the embodiment of the present invention：
1st, the qualitative and quantitative detection of platinum：
In embodiment 1, gained enrichment solution is warming up to 90 DEG C or so first, bright glassy yellow, symbol is presented in solution
Close《Platinum group metal and the chemical analysis guide of gold》Hereby Boolean lattice etc. writes pass described by (nineteen sixty-five version) page 94 to " Soviet Union " C.N. gold
In the phenomenon of platiniferous solution；
Secondly, in the superfluous liquor kalii iodide that concentration is 20%, as the Na in enrichment solution2<Ptcl6>When content is less
Rosiness is presented, works as Na2<Ptcl6>Red is presented when content is more, its reaction sensitivity is 2ug/L；
Again, under the NaOH effects of excess, Na2<Ptcl6>Form six hydroxyl network platinic acid H2[Pt(OH)6] or PtO2.4H2O
Salt, reacted with the solution containing alkali in acetic acid, white precipitate can be produced, this precipitation is dissolved in acid；
Finally, when platinum chloro-complex content is higher in solution, the solution forms the hydroxyl network of white precipitate six through solar radiation
Platinic acid H2[Pt(OH)6], 500ml concentration of precious metal solution is chosen, through above-mentioned reaction, after the white precipitate of precipitation is dried, is claimed
Weight, the content that platinum is calculated is 1-4ug/ml.
To sum up, above phenomenon qualitatively demonstrates the presence of platinum, and the content for quantitatively measuring platinum in enrichment solution is 1-4ug/
ml。
2nd, the detection of iridium, osmium
In example 4, after removing platinum and ruthenium, the NaOH that mass fraction is 20% is added into solution and is reacted,
When being heated to 90 DEG C or so, light blue precipitation and black colloidal substance are generated, after being heated to boiling, black-and-blue granular is produced and sinks
Form sediment, gained atrament is osmium；Then extracted with diethylene glycol monobutyl ether, water is dissolved in after HCl is acidified, 20%
The lower heating of NaOH effects produces positive blue precipitate, and the positive blue precipitate of gained is iridium, and the detection method is shown in《Platinum group metal and gold
Chemical analysis guide》Hereby Boolean lattice etc. writes (nineteen sixty-five version) page 94 to " Soviet Union " C.N. gold.
3rd, the detection of rhodium
In embodiment 3, the enrichment solution of gained noble metal is detected, first by the enrichment solution of the noble metal
After extracted platinum, the rose of distinctness is presented at 100 DEG C for resulting solution, is become colorless after 4 months through the hydrolysis that heats up, by
This can determine whether to contain rhodium in solution, and heating process has hydrolysis, illustrate that preservation condition should be Room-temperature seal preservation, the detection side
Method is shown in《Platinum group metal and the chemical analysis guide of gold》Hereby Boolean lattice etc. writes (nineteen sixty-five version) page 23 to " Soviet Union " C.N. gold.
4th, the detection of ruthenium
In embodiment 1, first by after the concentration of precious metal solution extraction platinum obtained by the present invention, remaining solution is rising
The rosiness crystal settling that reaction forms fine-powdered is carried out under the conditions of temperature with natrium nitrosum；Secondly in room temperature alkaline solution, this is expensive
Metal enrichment solution can form ruthenic chloride with the presence of the acid salt of chlorine, and the material can produce intense stimulus to skin and cause muddy
Body is red and swollen, and the phenomenon is shown in《Platinum group metal and the chemical analysis guide of gold》Hereby Boolean lattice etc. writes (nineteen sixty-five version) the to " Soviet Union " C.N. gold
27th, page 35, thus ruthenium is contained in the provable concentration of precious metal solution.
5th, the detection of palladium
After the concentration of precious metal solution extraction platinum obtained by the present invention, reddish-brown precipitation is produced in resulting solution, this is heavy
Shallow lake is soluble in hydrochloric acid, and resulting solution is brown after being dissolved in hydrochloric acid, it is possible thereby to prove to contain palladium in the solution.
6th, golden detection
In example 2, by the concentration of precious metal solution obtained by the present invention dibutyl ethylene glycol ether (abbreviation PBC, diethyl
Dibutyl ether is that colourless liquid analysis is pure, and strong to golden extracting power, selectivity is good) carry out 1:1 aqueous phase extracts, and is obtained after extraction
Yellow liquid, it is possible thereby to prove Aucl3Presence.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (8)
1. a kind of technique for being enriched with platinum group metal and gold, it is characterised in that comprise the following steps：
(1) it is powder to crush the raw material containing platinum group metal and gold, and the raw material containing platinum group metal and gold is flint clay；
(2) it is to be acidified in 1-4mol/L hydrochloric acid the powder to be added into molar concentration, is filtered after acidifying, removes filtrate, obtain
To reaction mass；
(3) alkali metal chloride, sulfuric acid solution and hydrochloric acid solution are sequentially added into the reaction mass, it is well mixed to mix
Material, the mixed material is heated to 60-90 DEG C of reaction 30-50min, cooled and filtered removes filter residue, and resulting solution is
Platinum group metal and the enrichment solution of gold.
2. technique according to claim 1, it is characterised in that the fineness of powder described in step (1) is more than 200 mesh.
3. technique according to claim 1, it is characterised in that the matter of powder described in step (2) and the hydrochloric acid solution
Amount is than being 1:2-5.
4. technique according to claim 1, it is characterised in that the molar concentration of hydrochloric acid solution described in step (3) is 1-
4mol/L, the sulfuric acid solution are by 0.9-1.1 by the concentrated sulfuric acid that mass fraction is 98% with water:1 mass ratio mixing gained.
5. technique according to claim 4, it is characterised in that reaction mass described in step (3), alkali metal chloride,
Sulfuric acid solution, the mass ratio of hydrochloric acid solution are 4.5-5.5：1：4.5-16.5：31.5-49.5.
6. technique according to claim 4, it is characterised in that after reaction terminates described in step (3), add alkali gold again
Belong to chloride and after reaction 30-35min at a temperature of 60-90 DEG C, then carry out the cooling, filtering, again in which addition
The mass ratio of the alkali metal chloride and the reaction mass is 1:4.5-5.5.
7. according to the technique described in claim any one of 1-6, it is characterised in that alkali metal chloride is described in step (3)
Sodium chloride and/or potassium chloride.
8. according to the technique described in claim any one of 1-6, it is characterised in that add in the course of reaction described in step (3)
Add light radiation.
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| CN109266853B (en) * | 2018-09-13 | 2020-05-08 | 陈永福 | Combined extraction process of platinum and ruthenium |
| CN109055774B (en) * | 2018-09-13 | 2020-08-18 | 陈永福 | Method for separating platinum, ruthenium and other platinum group metal hydroxides from solution containing platinum group metal ions |
| CN109161698B (en) * | 2018-09-13 | 2020-11-17 | 陈永福 | Method for preferentially absorbing ruthenium in process of enriching platinum group metals and gold |
| CN110669939A (en) * | 2019-11-12 | 2020-01-10 | 长春黄金研究院有限公司 | Method for recovering gold from wafer waste |
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| CN1038199C (en) * | 1994-11-30 | 1998-04-29 | 核工业北京化工冶金研究院 | Recovery of platinum family elements from waste catalysts |
| CN1042957C (en) * | 1995-12-18 | 1999-04-14 | 昆明贵金属研究所 | Method for extracting silver and gold in difficult infusion independent silver mine by flotating silver concentrate ore |
| CN1342779A (en) * | 2000-12-29 | 2002-04-03 | 张方宇 | Process for recovering metals Pt, Re and Al from waste reforming catalyst |
| CN1304612C (en) * | 2005-09-01 | 2007-03-14 | 徐致钢 | Process for extracting platinum metals from ore containing platinum metal |
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| CN102242265A (en) * | 2011-06-13 | 2011-11-16 | 白银万山稀贵金属科技有限责任公司 | Technology for extracting precious metal platinum from industrial solid waste materials |
| CN105132690A (en) * | 2015-09-20 | 2015-12-09 | 成都育芽科技有限公司 | Method for extracting gold, silver, platinum and palladium from electronic waste |
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